Add \asciicirc entity

* org-entities.el (org-entities): Added \asciicirc entity for ^;
  also fixed \circ expansion in latex.

TINYCHANGE

lisp/org-entities.el

@@ -252,7 +252,7 @@ loaded, add these packages to `org-export-latex-packages-alist'."
 
     "* Other"
     "** Misc. (often used)"
-    ("circ" "\\circ" t "ˆ" "^" "^" "ˆ")
+    ("circ" "\\^{}" nil "ˆ" "^" "^" "ˆ")
     ("vert" "\\vert{}" t "|" "|" "|" "|")
     ("brvbar" "\\textbrokenbar{}" nil "¦" "|" "¦" "¦")
     ("sect" "\\S" nil "§" "paragraph" "§" "§")
@@ -264,6 +264,7 @@ loaded, add these packages to `org-export-latex-packages-alist'."
     ("plus" "+" nil "+" "+" "+" "+")
     ("under" "\\_" nil "_" "_" "_" "_")
     ("equal" "=" nil "=" "=" "=" "=")
+    ("asciicirc" "\\textasciicircum{}" nil "^" "^" "^" "^")
     ("dagger" "\\textdagger{}" nil "†" "[dagger]" "[dagger]" "†")
     ("Dagger" "\\textdaggerdbl{}" nil "‡" "[doubledagger]" "[doubledagger]" "‡")